I found the whole thing completely baffling. Where we saw it, there was an intermission half way through, and everyone en masse turned to who they were with an went 'do you understand what's going on?'. Not a clue what most of it was about, my most pressing question being, how on earth did Davey Jones fall in love with Calypso in the first place if, before she was bound, she was nothing but crabs and wind?!